Holocene crustal movement along the coast of western Kobe and the 1995 Kobe Earthquake, Japan

Hiroshi Sato, Jun'Ichi Okuno, Shigehiro Katoh, Masao Nakada, Yasuo Maeda, Fumio Kobayashi

研究成果: ジャーナルへの寄稿学術誌査読

9 被引用数 (Scopus)

抄録

The 1995 Kobe (Hyogoken-Nanbu) Earthquake (Mj 7.2) in Japan, which has been attributed to the Nojima fault of the Rokko-Awaji fault system, resulted in vertical uplifts of 0.19 m at Tarumi and 0.07 m at Akashi, relative to Takasago. Here we evaluate these uplifts in the context of Holocene local tectonics derived from relative sea-level (RSL) records. For the purpose of this study, we estimate the Holocene relative uplift via a comparison study of observed and predicted sea-level variations along the traverse from Takasago to Tarumi and Akashi. These estimates are then applied to evaluate the uplift associated with the fault system responsible for the 1995 earthquake. As a rate of tectonic subsidence between 0.08 and 0.23 mm/yr corresponds well with the RSL index points determined for Takasago during the mid Holocene, uplift rates of 0.38-0.73 and 0.19-0.48 mm/yr are derived for Tarumi and Akashi, respectively, relative to Takasago. This suggests that the cumulated vertical uplift due to the Nojima fault activity, with a recurrence interval of approximately 2000 yr, may contribute at most 25% of the Holocene uplift proposed for the tectonically active coast of western Kobe.

本文言語英語
ページ(範囲)891-897
ページ数7
ジャーナルQuaternary Science Reviews
22
8-9
DOI
出版ステータス出版済み - 4月 2003

!!!All Science Journal Classification (ASJC) codes

  • 地球変動および惑星変動
  • 生態、進化、行動および分類学
  • 考古学
  • 考古学
  • 地質学

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